How can you create still image fire in Blender 2.8 Cycles?
I'm still learning to create fire in Blender as well but what helped me was (if you're down with that?) is using premade FireFX mov. files and import them as planes. They are ofc animated but you can use it as stills also and it's a great way to use fire in your art even though you did not make them yourself atm. You should be able to shape it in a heart in some way. When you import them make sure to select EMIT or the fire won't be bright. Also it will shine on objects in Cycles but you have to add a light in Evee to create the illusion. Grts
PS; I've used these; https://www.youtube.com/watch?v=-pljzKVwkzU
Link is in the description below the video. Hope this helped a bit. I for one can't get Mantaflow to work for the life of me no matter how much tutorials I copy to the letter so this helped me out seriously. Happy creating!